18918319

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1381}}^1$

素因数の和:1510

約数の個数: 16

約数和(自身を含む): 22996480

約数和(自身を除く): 4078161

約数列:

[1, 7, 19, 103, 133, 721, 1381, 1957, 9667, 13699, 26239, 142243, 183673, 995701, 2702617, 18918319]

約数ペア:

[(1, 18918319), (7, 2702617), (19, 995701), (103, 183673), (133, 142243), (721, 26239), (1381, 13699), (1957, 9667)]